Private migraine diary for iPhone
A migraine diary that never sees your data
Log an attack in three seconds, let on-device statistics find your triggers, and hand your neurologist a report worth their time. No account. No server. No tracking.
iPhone & Apple Watch · iOS 18+ · 10 languages · Free to log
How it works
Three steps. All of them happen on your phone.
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1
Log it in one tap
When an attack starts, tap once and set the pain on a full-height dial built for one thumb and closed eyes. Symptoms, medication and how it ended can wait.
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2
Baro freezes the context
Sleep, heart rate, barometric pressure and humidity are captured from Apple Health and Apple Weather at that moment — and stored only on your device.
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3
Patterns surface themselves
Transparent statistics compare your attack days against your ordinary days, then say what they found — with the numbers behind it.
A calm app for a loud symptom
Dark, low-glare, and readable when light hurts.
Understand your migraines — privately
Everything runs on your iPhone. Nothing is uploaded, ever.
One tap to log
Tap once and set the pain — from the app, a widget, the Lock Screen or your Apple Watch. Everything else is back-fillable later.
Your own patterns
Transparent statistics — not a black box — surface what precedes your attacks: short sleep, falling pressure, humidity and more, each shown with its evidence.
Today's forecast
When today's conditions line up with your past attacks, Baro says so — and names exactly which of your patterns are active, before one starts.
Doctor-ready report
Generate a clean PDF — frequency, severity, medication response and trigger associations — to hand your neurologist or GP.
Private by design
No account, no ads, no third-party SDKs. Export everything as JSON or CSV, or erase it, any time. A data breach can't expose what we never hold.
Watch, widgets & Live Activity
Log from your wrist with the Digital Crown, glance at an attack in progress in the Dynamic Island, or start one from the Home Screen.
Logging is free. Forever.
Your diary is yours. Pro turns it into understanding.
Free
$0
- Unlimited attack logging
- Full history & attack detail
- Widgets, Watch & Live Activity
- Export as JSON or CSV
Baro Pro
$39.99/year
- Everything in Free
- Trigger patterns with evidence
- Today's risk forecast
- Doctor-ready PDF report
About $3.33/month. Also $5.99/month, or $89.99 once for Lifetime. Prices shown in USD; your local price may differ.
Questions
Is my data really private?
There is no server to send it to. Baro has no account system, no analytics and no third-party SDKs — the dependency count is zero, which is what makes the claim verifiable rather than a promise. Your history lives in your phone's storage, and you can export or erase all of it in one tap.
If there's no server, what about the weather data?
Baro's only network request goes to Apple WeatherKit. Your approximate location is used momentarily to read local barometric pressure and humidity, and is never stored — only the resulting reading is kept, on your device. No third-party weather API ever sees you.
Why statistics instead of AI?
With 10–50 attacks a year, a transparent association test beats a learned model and — crucially — stays explainable. Baro can always show you the arithmetic behind an insight: “3.0× more likely — seen before 14 of 22 attacks.” Statistics decide; the app only narrates.
How long before I see patterns?
A handful of attacks alongside your ordinary days is usually enough for a first signal, and confidence is labelled honestly — early signal, moderate, or strong — so you always know how much weight an insight deserves.
Do I need Apple Health?
No. It's optional, read-only, and you choose exactly what to share. Health data (sleep, heart rate, cycle, activity) simply gives the pattern engine more signals to test. Baro works without it.
Is Baro a medical device?
No. Baro is a self-tracking tool. It never diagnoses, and its insights are statistical associations, not medical advice. It's designed to make the conversation with your doctor a better one.
Is there an Android version?
Not today. The zero-SDK privacy model leans on Apple Health, WeatherKit and on-device frameworks. If enough people ask, an Android version is worth doing properly.
Start your diary tonight
Free to log, forever. Nothing leaves your phone.